How to add image descriptions for screen readers on iPhone, iPad, and iPod touch | Apple Support

You can enhance photo accessibility by adding image descriptions, aiding screen readers like VoiceOver. Open the photo in Photos, tap Edit, then the markup button. Next, select Description and input a descriptive text for the photo. Afterward, tap Done twice to save changes. For instance, a description might detail a scene, like a “very happy white dog with big pink ears and a curly tail standing on a riverbank after going for a swim.”

Summary:
– Enhance photo accessibility by adding image descriptions.
Open the photo in Photos and tap Edit.
– Select the markup button and then Description.
– Input a descriptive text for the photo.
– Tap Done twice to save changes.